X-ray protective materials from barium sulfate/amorphous cellulose/natural rubber composites

Mungpayaban, Harinate; Rindhatayathon, Pongphanot; Ninlaphruk, Sumalee; Rueanngoen, Areerak; Ekgasit, Sanong; Pengprecha, Somchai

doi:10.1016/j.radphyschem.2022.110011

Cited by 6 publications

(5 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The NR/WP composites also included paraffin wax and boron carbide (B 4 C), which improved radiation shielding. The optimum was obtained at 42% modified WP, 18% paraffin wax, and 20% B 4 C. In recent work, NR + barium sulfate + WP composites were developed as a radiation attenuation material and were applied in X-ray shielding [ 85 ]. Prototypes with a 0.25 mm thickness were produced, showing good dispersion of the barium sulfate in the rubber matrix, and influencing the absorption of incident X-rays.…”

Section: Waste Paper-polymeric Compositesmentioning

confidence: 99%

Waste Paper as a Valuable Resource: An Overview of Recent Trends in the Polymeric Composites Field

et al. 2023

View full text Add to dashboard Cite

This review focuses on polymeric waste-paper composites, including state-of-the-art analysis with quantitative and qualitative discussions. Waste paper is a valuable cellulose-rich material, produced mainly from office paper, newspaper, and paper sludge, which can be recycled and returned to paper production or used in a new life cycle. A systematic literature review found 75 publications on this material over the last 27 years, with half of those published during the last five years. These data represent an increasing trend in the number of publications and citations that have shown an interest in this field. Most of them investigated the physicomechanical properties of composites using different contents of raw waste paper or the treated, modified, and cellulose-extracted types. The results show that polyethylene and polypropylene are the most used matrices, but polylactic acid, a biodegradable/sourced polymer, has the most citations. The scientific relevance of waste-paper composites as a subject includes the increasing trend of the number of publications and citations over the years, as well as the gaps identified by keyword mapping and the qualitative discussion of the papers. Therefore, biopolymers and biobased polymers could be investigated more, as well as novel applications. The environmental impact in terms of stability and degradation should also receive more attention regarding sustainability and life cycle analyses.

show abstract

Section: Waste Paper-polymeric Compositesmentioning

confidence: 99%

Waste Paper as a Valuable Resource: An Overview of Recent Trends in the Polymeric Composites Field

et al. 2023

View full text Add to dashboard Cite

show abstract

“…For example, the values of tensile strength and elongation at break of NRL gloves were reduced from 22 MPa and 1250%, respectively, in pristine NRL gloves to just 5 MPa and 700%, respectively, in 200 phr Bi 2 O 3 /NRL gloves, with these latter values being lower than the mechanical requirements for non-aged medical examination latex gloves (ASTM D3578-19) [25,27]. Another report revealed that the same mechanical parameters for eucalyptus pulp/NR composites were reduced from mean values (±standard deviation) of 10.02 ± 0.88 MPa and 733 ± 5%, respectively, in those without BaSO 4 to 8.39 ± 1.07 MPa and 558 ± 19%, respectively, in those containing 22.46 wt% BaSO 4 , confirming the negative effects of such fillers on the mechanical properties of the composites [28]. Hence, clearly, a novel and improved procedure/method is required to limit reductions in the mechanical properties of the shielding composites after the addition of protective fillers.…”

Section: Introductionmentioning

confidence: 85%

Multi-Layered Composites of Natural Rubber (NR) and Bismuth Oxide (Bi2O3) with Enhanced X-ray Shielding and Mechanical Properties

2023

View full text Add to dashboard Cite

Due to rapid increases in the utilization of radiation and nuclear technologies, effective and suitable radiation-shielding materials have become one of the most sought-after options to protect users and the public from excessive exposure to the radiation. However, most radiation-shielding materials have greatly reduced mechanical properties after the addition of fillers, resulting in their limited useability and shortened lifetime. Therefore, this work aimed to alleviate such drawbacks/limitations by exploring a possible method to simultaneously enhance both the X-ray shielding and mechanical properties of bismuth oxide (Bi2O3)/natural rubber (NR) composites through multi-layered structures, with varying (1–5) layers and a total combined thickness of 10 mm. To correctly determine the effects of the multi-layered structures on the properties of NR composites, the formulation and layer configuration for all multi-layered samples were tailored such that their theoretical X-ray shielding properties were equal to those of a single-layered sample that contained 200 phr Bi2O3. The results indicated that the multi-layered Bi2O3/NR composites with neat NR sheets on both outer layers (sample-D, sample-F, sample-H, and sample-I) had noticeably higher tensile strength and elongation at break than those of the other designs. Furthermore, all multi-layered samples (sample-B to sample-I), regardless of the layer structure, had enhanced X-ray shielding properties compared to those with a single layer (sample-A), as shown by their higher values of the linear attenuation coefficient (µ) and lead equivalence (Pbeq) and the lower value of the half-value layer (HVL) in the former. This work also determined the effects of thermal aging on relevant properties for all samples, with the results revealing that all the thermal-aged composites had higher values for the tensile modulus but lower values for the swelling percentage, tensile strength, and elongation at break, compared with the non-aged composites. Hence, based on the overall outcomes from this work, it could be concluded that the worrisome decreases in mechanical properties of the common single-layered NR composites after the addition of Bi2O3 could be prevented/reduced by introducing appropriate multi-layered structures, which would not only widen potential applications but also prolong the lifetime of the composites.

show abstract

“…Progress has been achieved with the incorporation of metal powders into polymer sheets, increasing the compound resistance against cracks and other forms of deterioration [14,15]. The weight of the shielding garments and the lead content has been minimized with the replacement of a fraction of lead with new elements with a moderate atomic number such as tin, antimony, and barium [16,17].…”

Section: Introductionmentioning

confidence: 99%

“…In previous investigations [17,26], barium was employed in combination with other heavy metal powders, including bismuth and tungsten, along with the renewable biopolymer amorphous cellulose; these were used as additives within a high-viscosity silicone rubber (SR) matrix. Some of these studies [27] involved the incorporation of substantial loading levels, reaching a weight ratio of 60%, into the polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

“…This process leads to the uneven distribution of the product, resulting in voids that can compromise the shielding quality [35,36]. To address these issues, the use of nanoscale barium particles [17] or dispersant agents [37] can aid in achieving a more uniform distribution of the materials. This, in turn, reduces particle aggregation and minimizes the occurrence of voids.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Development of Lead-Free Radiation Shielding Material Utilizing Barium Sulfate and Magnesium Oxide as Fillers in Addition Cure Liquid Silicone Rubber

Souza,

Kruger,

Nascimento

et al. 2023

Polymers

View full text Add to dashboard Cite

The radiological protection has the purpose of safeguarding the physical well-being of the user, preventing exposure to detrimental levels of ionizing radiation. This study introduces a novel, cost-effective category of lead-free elastomeric material designed for radiation shielding. The filler compounds utilized are notably lighter than conventional lead-based materials, enhancing user ergonomics during application. They comprise of a blend of barium sulfate combined or not with magnesium oxide with addition-cure liquid silicone rubber. To ensure the effectiveness of the radiation shielding, X-ray transmission measurements were performed for the different thicknesses of the materials and the results compared with Monte Carlo simulations. Additionally, the physical properties of the new materials, such as density, homogeneity, tensile strength, viscosity, and wettability, were also evaluated. The findings indicate that both materials fulfill the requirement for application in radiation protection garments.

show abstract

X-ray protective materials from barium sulfate/amorphous cellulose/natural rubber composites

Cited by 6 publications

References 13 publications

Waste Paper as a Valuable Resource: An Overview of Recent Trends in the Polymeric Composites Field

Waste Paper as a Valuable Resource: An Overview of Recent Trends in the Polymeric Composites Field

Multi-Layered Composites of Natural Rubber (NR) and Bismuth Oxide (Bi2O3) with Enhanced X-ray Shielding and Mechanical Properties

Development of Lead-Free Radiation Shielding Material Utilizing Barium Sulfate and Magnesium Oxide as Fillers in Addition Cure Liquid Silicone Rubber

Contact Info

Product

Resources

About